I'm looking for a tileset that not only has solid black tiles, but also has solid black slopes. The slopes also have to be arranged to that the black part is at the top. I want to use it for a sort of lighting system. Think of the sort of thing you see in some levels using top secret 3, except in reverse.

The other requirement is that the slopes go in both directions. I will be using trigger scenery, so I can't flip them.

If I can't find a tileset I'll just edit one myself. Omen Woods comes very close (there are tiles like this near the bottom), but they require flipping.

This request is a bit of a long shot since there are probably no tilesets which are suitable. But I might as well ask, since it's better than making an unsolicited edit.

I know of none, and I've probably seen every tileset ever (which can be found on J2O).

Glowee (though the slopes are not smooth)
Castle2Black (almost smooth)
Jazz 1: Medivo (not totally black)
WAZ03 (not totally black)
Virus(waz05) (not totally black, but several angles)
Land of Skulg (very faint border line)
Mario 3 Night (pixelated)
Prismatic Palace
Mysterious Forest
Simple 2
Cheq

lol UR wins, crimi

Sorry I only use decent tilesets for SP projects that are never finished.
PS: Make your own tilesets because people will rate any pack 10+.